package parser

import (
	"regexp"
	"strings"

	"exhq.dev/pas/src/Constants"
)

func CheckIpSyntax(ip string) bool {
	res, _ := regexp.MatchString(`^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}$`, ip)
	return res
}

func CheckDomainSyntax(domain string) bool {
	res, _ := regexp.MatchString(`[a-z0-9]{2,}\.(gaming|sex2|dev|meow|horse)`, domain)
	return res
}

func CheckKeysExistDomain(m map[string]string) bool {
	for _, key := range []string{"domain", "ip"} {
		if _, ok := m[key]; !ok {
			return false
		}
	}
	return true
}

func ParseIntent(intent string) Constants.Intent {
	if intent == "" {
		return Constants.Intent{
			Method:  Constants.UNKNOWN,
			Path:    "",
			Version: "",
			Headers: map[string]string{},
		}
	}

	lines := strings.Split(intent, "\n")
	if len(lines) < 1 {
		return Constants.Intent{
			Method:  Constants.UNKNOWN,
			Path:    "",
			Version: "",
			Headers: map[string]string{},
		}
	}

	firstLine := lines[0]
	parts := strings.Fields(firstLine)
	if len(parts) != 3 {
		return Constants.Intent{
			Method:  Constants.UNKNOWN,
			Path:    "",
			Version: "",
			Headers: map[string]string{},
		}
	}

	method := Constants.UNKNOWN
	if parts[0] == string(Constants.GET) {
		method = Constants.GET
	} else if parts[0] == string(Constants.POST) {
		method = Constants.POST
	}

	headers := make(map[string]string)
	for _, line := range lines[1:] {
		headerParts := strings.SplitN(line, ":", 2)
		if len(headerParts) == 2 {
			headers[strings.TrimSpace(headerParts[0])] = strings.TrimSpace(headerParts[1])
		}
	}

	return Constants.Intent{
		Method:  method,
		Path:    parts[1],
		Version: strings.ReplaceAll(parts[2], "PAS/", ""),
		Headers: headers,
	}
}